Hector,   The modem is not the issue, so don't waste your time. We have the same issue as well. Its only with Cox and no other ISP at this point. I don't know all the specifics but what I can tell you is that it has to do with Cox's legacy platform (not modem specifically) and the backend devices. This started happening with the upgrade to 13.x code MX since Meraki changed how the static IP is added to the device. Before in the 12 code it was all or nothing. Now in 13.x they have a series of checks that the MX goes through, one being the gateway ARP. On the legacy Cox code it doesn't respond to the gateway arp because of either a bug or something else and the Meraki checks fail.  This reverts it back to DHCP and gives you the "Bad IP assignment". Cox can clear the ARP on their end which allows the static IP again but since the gateway ARP check is still failing it gives you that alert still. If you were to change anything on the WAN IP page or reboot the MX it will cause it to fail back to DHCP and you will need to call in again.On Cox's new platform, the checks succeed so there is no issues. The only way right now to prevent the "bad IP" notice is to revert back to DHCP and stay there. This is what we did for the time being. Meraki Support is working with Cox and Cisco proper on a resolution. I ask for an update every other day and haven't got one yet.  ... View more

Im well aware of the thermal issues. This is another issue that Meraki, I would imagine, hasn't seen yet and therefore hasn't started the replacement process or firmware patch.  ... View more

yeah we have all that as well. Currently we have 33 switches with the thermal problem that need to be replaced and we are going through that now. Some have failed already. We have some devices that do the up/down speeds that we need to replace as well. This is a third condition that just popped up after the 9.30 code release of the increase fan speed for all switches. Some 225's are higher than normal but ok, some are "jet airplane" loud.  ... View more

I posted this on another thread but this is similar in nature:   We are having similar issues. Some of our 225-48LP's sound like a jet engine with or without POE load on them. Some sound like a normal switch. All are on the 9.30 code. Support has no idea at this point. I have a case open and right now they are at a loss. I really think there is a sub issue with these switches besides the thermal problem. I can't imagine their engineering team allowing the fans to be rev'ed on high constantly as a solution to this.    I get the 9.30 increased the speed on the fans to prevent the temp issues however we have two identical switches both confirmed showing the same fan speed by Support. One sounds like a normal fan, one you can hear 50 ft away and is still loud. I am hoping they figure this out and have a bulletin to replace these as well.  ... View more

We are having similar issues. Some of our 225-48LP's sound like a jet engine with or without POE load on them. Some sound like a normal switch. All are on the 9.30 code. Support has no idea at this point. I have a case open and right now they are at a loss. I really think there is a sub issue with these switches besides the thermal problem. I can't imagine their engineering team allowing the fans to be rev'ed on high constantly as a solution to this.  ... View more